Pasteurizing apparatus.



W. J. DAVIS. PASTEURIZING APPARATUS. nrmonmn FILED 10.22, 1912.

1,107,765, Patented Aug. 18, 1914.

3 SHEETS-SHEET 1.

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W. J. DAVIS. PASTEURIZING APPARATUS.

APPLIUATION FILED AUG. 22, 1912.

Patented Aug. 18, 19m

3 SHEETS -SHEET 2.

W. J. DAVIS. msmumzme APPARATUS.

APPLICATION FILED AUG. 22, 1912.

3 SHEETS-SHEET 3.

Patented Aug. 18, 1914.

WILLIAM J. DAVIS, OF CHICAGO, ILLINOIS.

PASTEURIZING APPARATUS.

Specification of Letters Patent.

Patented Aug. 18, 1914.

Application filed August 22, 1912. Serial No. 716,374.

To all whom it may concern:

Be it known that I, WILLIAM J. DAVIS, a citizen of the United States,and a resident of Chicago, in the county of Cook and State of Illinois,have invented certain new and useful Improvements in PasteurizinApparatus, of which the following is a fu 1, clear. and exactspecification.

My invent on is concerned with apparatus for pasteurizing milk, beer,etc, and more especially with automatic apparatus by which the milk,beer,etc., when raised to the pasteurizing temperature can be held atthat temperature for the desired length of time to insure thedestruction of germs in the milk, etc., being treated.

It is concerned with a device of the class described that shall berovided with means for automatically keeping the milk in motion durinthis holding step, so as to pre* vent possi le separation of the butterfat from the milk.

It. is further concerned with a device of the class described that shallbe provided with means for maintaining the milk at the desiredtemperature.

It is further concernedwith a construction wherein the valve mechanismcontrolling the movement of the milk to and from the vats shall besimple in its construction and of a character that can be readilycleaned when necessary.

It is also concerned with certain other features that will be fullydescribed in the specification, and particularly pointed out in theclaims.

To illustrate my invention I annex-hereto three sheets of drawings, inwhich the same reference characters are used to designate identicalparts in all the figures, of which:

Figure 1 is a side elevation of the apparatus; Fig. 2 is a top plan viewpartly in section, and with some of the vats removed; Fig. 3 is a detailin section through the tank and one of the vats as if in sect on on theline AA of Fig. 2; Fig. 4 is a detail in section as: if on line B--B ofFig. 2; Fig. 5 is a top plan view on the same scale of one corner of thetank and vats; Fig. 6 is a detail in top plan view showingone form ofthe automatically opprated valves which I preferably employ; ig. 7 is asimilar view as if in section on the line O-C of Fig. 6; Fig. 8 is aview similar to Fig. 6 showing a slight modification; Fig. 9 is a planview partly in section throu h the valve proper showing another modication; and Fig. 10 is a side elevation of the construction shown inFig. 9.

In carrying out my invention in its referred form, employ hot water asthe uid for keeping the liquid to be treated at the pgsteurizingtemperature, although it will understood that I contemplate employingotherfluids, or the electric current may be em loyed for this purpose.\Vhere a liquid, sue as water is emp oyed, it is held in a tank llwhichis preferably of a generally rectangular shape and may be mounted uponlegs 12 of which there will ordinarily be one at each corner. This tankis preferably constructed of metallic plates suitably connected to form.a water tight receptacle into which the hot water may be introduced atany point, as for instance through the pipe 13 at the lower side of oneend thereof, and the overflow of water therefrom may escape through thepipe 14 located diagonally from the pipe 13, as I preferably employ themethod of supplying the desired amount of water to keep the milk at thedesired temperature shown in my application for a Patent No. 716,373,filed August 22. 1912.

Suitably supported in the tank from the top thereof is a series of vats15, which are preferably made of iron suitably enameled on the interiorand finished without any corners upon the interior so that they can bereadily cleansed. To support these vats in place, I preferably employthe construction shown, wherein it will be seen that the front and rearupper edges of the tank 11 have the rectangular recesses 16 therein,which are adapted to receive the channel bars 17, having the flaringends 18. by which said bars may be permanently secured in place by therod 19 passing through said flaring portions vats 15 adapted to extendinto the channel 17 in the manner clearly shown in Fi 4. This method ofmounting the vats 1n the tank serves to support them in a manner inwhich have the overhanging flange 20 and the sides of the tank. The

all parts are readiy accessible for cleansing, and in case of anaccidental overflow of any of the ,vats, the overflowing contents willbe discharged upon the floor and not in any adjacent vat.

1 preferably cover the entire series of vats, of which I have, forexample, shown seven, by a series of sheet metal covers 21, which are ofthe' proper shape to fit over the tops ofthe vats and cover them, eachof these covers being provided with a pair of off-set portions 22 toaccommodate the rock shaft-23, and with the off-set portion 24 toaccommodate the spout 25. In order to lift all these coverssimultaneously I preferably employ a pair of standards-26 and 27, thestandard 27 being shown in Fig. 1, ,while the corresponding standard 26is of the same shape and located at the other end, and in the upper endsof these standards I journal the drum shaft. 28 upon which is adapted tobe mounted two or more ropes or. chains 29, the lower ends of which arepreferably divided so as to be connected to two separate rods 30 and 31,which rods cooperate with the recesses 32, 33 and 34 formed in the bail35 secured on the top of each of the covers 21. On one end of the shaft28, I secure a sprocket wheel 36, which is connected by the sprocketchain 37, with a sprocket wheel 38, JOlII'IlfllBd on a suitable bearingsupported from the side of the tank 11, and provided with the handle 39,bv which it may be turned so that the shaft 28 can be rotated in theproper direction to raise or lower simultaneously all the covers 21. Ifit is desired to raise the covers in a horizontal osition, as shown inFig. 1, the rods 30 and 31 cooperate with the recesses 32 and 34. If itis desired to lift the forward end of the cover first, the rod 31 willbe placed in the recesses 33 of the bails 35, and with this arrangementit will be obvious that the forward end of the covers will be liftedfirst and that they will finally hang in an inclined position.

The milk to be treated comes from the pasteurizer through the pipe 40,which is connected with the horizontal pipe 41 extending substantiallythe length of the tank at the rear thereof, and at the proper height sothat the spouts 25 connected therewith may extend over the upper rearedges of the vats 15 in the manner clearly shown in Fig. 3, so that whenthe valve 42 in the spout 25 is turned in the proper direction, the milkwill flow into the vat. The lower forward ends of the tanks 15 havesecured thereto and projecting therefrom through the front wall of thetank 11 the discharge spouts 43, each of which has a valve 44 like thevalve 42. The forward end of each of these discharge spouts is connectedto the discharge pipe 45, which will have one end thereof connected withthe pipe 46 leading to the coolers employed to chill the milk after thepasteurization has been completed. It will be noted that these spouts 25and 43, and the pipes -10, 41, 45 and 46 have their ends closed byremovable screw caps 47 so that the interiors of said pipes can bereadily scrubbed, and it will be noted from Figs. 6-to 10 that thevalves 42 and 44 located in the spouts are of a construction that can bereadily removed and cleaned, it being of vital importance inconstructions of this character that all the parts can be thoroughlycleansed and sterilized after each operation to insure that the milkshall not be contaminated by the apparatus itself. To operate thesevalves 42 and 44 automatically at the proper time, I may employ anysuitable motive power, such as the motor 48, suitably supported at oneend of the tank and having the pinion 49 on its armature shaftcaringwith the spur ear wheel 50 secured on the horizontal sha t 51, suitablyjournaled in bearings on the end of the tank. This shaft 51 carries atthe central portion thereof the worm 52, which meshes with the worm gearwheel 53, secured on the shaft 54, suitably 'ournaled in bearingscarried on the end of the tank 11, and having secured at its lower endthe worm 55, which meshes with the worm wheel 56 rigidly secured to thecam 57, the worm wheel and cam being suitably journaled on the studshaft 58, supported from the end of the tank 11. This cam 57 coiiperateswith the anti-friction roller 59 journaled on the bell crank lever 60,the horizontal arm of which supports the weight 61, to hold the leverand the roller 59 against the cam, while the vertical arm is connectedby the links 2 and 63 with the arms 64 and 65 journaled on the ends ofthe rock shafts 66 and 67, which rock shafts are journaled in suitablebearings supported from the front and rear sides of the tank. The levers64 and 65 carry the pawls 68 and 69 which coiipcratc with the ratchetwheels 70 and 71 rigidly secured on the shafts 66 and 67 respectively,so that at each rotation of the cam disk 67; the ratchet wheels 70 and71, and the attached shafts 66 and 67 will be turned a throughoneseventh of a complete revolution.

In the preferred construction shown in Figs. 6, 7 and 8, the shafts 66and 67 are each provided with seven pairs of arms 72 and 73, these armsbeing provided) on their outer ends with anti-friction rollers 74, andbeing located in certain angular relationship on their shafts so. as tocarry out the operation to be described. The valves 42 and 44 have theconical bodies 75 with the passage 76 therethrough adapted in oneposition to register with the passage through the spouts and in theother position to be 90 degrees from registration, so as to shut off thefiow through the spouts. Secured on the u per end 0 the valve body is anarm 77 w ich maybe ecoentrically located as shown in F B, or which mayhave the curved form shownin Fig. 8, so that as the shaft 67 rotates inthedirection indicated by the arrow in Fig. 6, the roller on the arm 73will strike one end of the arm 77 and swing it from the full line to thedotted line position. In this movement, the valve will be opened, andthe milk from the pasteurizer will be allowed to flow into the vatassociated with that valve until the next revolution of the cam 57, whenthe anti-friction roller on the arm 72 will strike the other end of thearm 77 and swing the arm and the attached valve back to the full lineclosed position, thus closing the valve and preventing any further flowof milk into that particular vat. The arms 72 and "('3 on the shafts 66and 67 are so arranged that if we take the vats at one end, as at theleft hand end of Fig. 2, the valve 44 for that vat will be open, whilethe cocks 44; for the other vats will all be closed. At the same time,the cock 42 for the right hand vat will be open, and the cocks 42 forthe other vats will be closed. \Vith this condition, it will be seenthat while the cam 57' is making one rotation, the milk will be flowinfrom the left hand vat and flowing into the right hand vat, while thefive intermediate vats will be filled with milk and there will be nomovementof the milk into or from any of said five intermediate vats. Atthe next operation, the valves will be turned so that the valve 44 ofthe, left hand vat will be closed, and the valve 42 of the same vatopened so that said vat will be filled during the next interval. Thevalve 44cof the next to the left hand vat will be opened, and it will beemptying during this. next period. The valve 42 of the right hand vatwill be closed and the-milk will standin this right hand vat as well asin the four intermediate vats. From the foregoing, it will be seentherefore that if the parts are geared up so as to take five minutes forthe rotation of the cam 57, each vat will have the milk held thereinduring a period of thirty minutes, which is the proper length of time toeffect the pasteurization at a certain temperature, under which thesystem is designed to opcrate.

In Eigs. 9 and 10, I have illustrated a modification of the valveactuating mechanism. in which the valve body 75" is set horizontallyinstead of vertically, and is arranged to be advanced continuously inthe same direction instead of being reciprocated as in the constructionshown in Figs. 6 to 8. With this form, instead of the arms 77, I secureon the shafts'GG and 67 a fourarmed star wheel 77, and instead of havingthe two separated arms '72 and 73 in different planes, I have the arms72 and 73 located in the same plane, and preferably rigidly secured toor integral with each other at their lower ends, and the anti-friction'rollers 74 which terminate these arms will cotiperate' with the arms ofthe star wheel 77 so as to first open the cock by moving it through 9.0degrees and then close it by moving it through another 90 degrees in thesame direction.

In carrying out the novel process of passteurization described in myaforesaid application, No. 716,373, filed August 22, 1912, I agitate themilk during the entire holding period to prevent possible rising of thebutter fat, and for this purpose I employ in the specific mechanismshown the rock shaft 23, journaled in suitable bearings, secured on theend of the tank, and having the paddles or st-irrers 78 rigidly securedthereon, and extending down into the bodies of the vats. To rock thisshaft 23 at a suitable speed and thus secure the constant but notviolent agitation of'the milk, I provide on the end of the shaft 51 aworm 79 which meshes with the worm wheel 80 suit ably journaled upon astud shaft projecting from the end of the tank 11, and a link 81connects an eccentric pin on the worm wheel 80 with the slotted arm 82secured on the rock shaft 23. By the connection SICWD, the motor 48 willserve not only to operate the valves 42 and 44 automatically at theproper time, but also to keep, the paddles 7 8 in constant motion.

\Vhile I have shown and described my invention as embodied in the formWhich I at present consider best adapted to carry out its purposes, itwill be understood that it is capable of modification, and that I do notdesire to be limited in the interpretation of the following claimsexcept as. may be necessitated by the state of the prior art.

What I claim as new, and desire to secure by Letters of the UnitedStatesis:

1. In a device of the class described, the combination with a singletank containing a heating fluid, of a plurality of holding vats mountedtherein, having their flat vertical sides adjacent each other and thewalls of the tank, a corresponding plurality of valves controlling theadmission and discharge of the treated fluid to and from each of saidvats, and automatic mechanism for operating thesupply and dischargevalves of the various vats serz'atim, so that one vat will be emptyingwhile another is filling, and so that the fluid will remain in each vata certain period of time.

2, In a device of the class described, the combination with a pluralityof holding vats, of a corresponding pluralitv of valves controlling theadmission and discharge of the treated fluid to and from each of saidvats, automatic mechanism for operating the supply and discharge valvesof the various vats, so that one vat will be emptying while another isfilling, and so that the lluid will remain in each vat a certain periodof time after, the completion of the filling and before the beginning ofthe emptying, a corresponding plurality of stirring members, oneextendin to each vat, and a single operating mechanism for the stirringmembers, acting through them constantly to stir gently the fluid in thevats.

3. In a device of the class described, the. combination with a pluralityof vats, of a rock shaft carrying a plurality of stirrers, one for eachvat, a plnralitv of cocks controlling admission of the liquid to betreated to the vats and its discharge therefrom, and automatic mechanismfor rocking said shaft and operating said valves, so that one vat willbe emptying while another is filling, and so that the fluid will remainin each vat a certain period of time.

il. In a device of the class described, the cmnbination with a pluralityof vats, of a rock shaft carrying a plurality of stirrers, one for eachvat, a plurality of cocks controlling admission of the liquid to betreated to the vats and its discharge therefrom, a pair of shaftscontrolling the movement of the cocks, and automatic mechanism forrocking said rock shafts and operating the other shaft at intervals, sothat one vat will be emptying while another is filling, and so that thefluid will remain in each vat a certain period of time.

In a device of the class described, the combination with a plurality ofvats,'of a rock shaft carrying a plurality of stirrers, one for eachvat, a rotary shaft, means for rotating said shaft, a worm on saidshaft, a worm wheel meshing therewith, an eccentric pin thereon, an armon the rock shaft,-

and a link connecting said pin and arm.

6. In a device of the class described, the combination with a series ofrectangular holding vats placed side by side, of a rectangular tankadapted to be filled with a heating medium and inclosing said holdingvats surrounded with a heating medium: straight inlet and outlet pipesextending transversely of and each having an opening connected to eachof said holding vats, valves in each connection between said pipes andholding vats. and mechanism by which each valve in each pipe may besuccessively opened and by which an inlet pipe in each holding vat willbe opened and the outlet valve from the same vat will be closedsimultaneously.

T. In a device of the class described, the combination of a tank, With anumber of holdin vats therein, means for surrounding said he ding vatswith a heating medium. a mechanism for successively filling said holdingvats and for successively emptying the same after the liquid treatedtherein has been held for the desired period after the completion of thefilling and before beginnmgthe emptying, and means for keeping theliquid in said holding vats in constant motion during the holdingperiod, said means consisting of a stirring member for each vat, and acommon driving member for actuating all of said stirring members.

8. In a device of the class described, the combination with a tank, of aplurality of holding vats therein, means for surrounding said holdingvats with a heating medium, an inlet pipe with valves connectedtherewith by which said holding vats may be successively filled with theliquid to be held therein, an outlet pipe with valves con nectedtherewith by which the liquid so held in saidholding vats may besuccessively discharged therefrom after it has been held therein for acertain length of time after the completion of the filling operation,agitators in each of said holding vats by which the liq id therein maybe kept in motion while being so held, and a single driving mechanism bywhich said valves connected with said inlet and outlet pipes areoperated and the said agitators are actuated.

9. In a device of the class described, the combination with a pluralityof holding vats, of inlet and outlet valves from each of said holdingvats, a mechanism by which said valves may be severally and successivelyopened and closed at stated periods, straight inlet and outlet pipesextending transversely of the vats having removable caps for their ends,and straight connecting pipes in which said valves are located extendingfrom the inlet and outlet pipes to the vats and provided with removablecaps at their outer ends.

10. In a device of the class described, the combination. with aplurality of holding vats, of straight inlet and outlet pipes extendingtransversely of the vats and having removable caps for their ends.straight conremovable caps at their outer ends, inlet and outlet pipesto the vats and provided with removable caps at their outer ends, inletand outlet valves for each of said holding vats removably mounted in thestraight com nccting pines. and mechanism by which said valves may beseverally and successively opened and closed at stated periods.

11. In a device of the class described. the combination with a pluralityof holding vats. of straight inlet and outlet pipes extendingtransversely of the vats, connecting pipcs from the inlet and outletpipes to the vats, inlet and outlet valves for each of said holding vatslocated in said connect ing pipes and arranged in a line transversely tothe vats, fingers on said valves, a

-,.- at stated periods, and means for rotating the shaft at intervals.

In witness whereof I have hereunto set my hand and aflixed my seal, this19th day of August, A. D, 1912.

WILLIAM J. DAVIS.

\Vitnesses:

JOHN HOWARD MoELRoY, MILDRED ELSNER.

shaft extending parallel to the valves and hand and afiixed my seal,this19th day of provided with actuating members to engage August, A. D,1912.

the fingers, whereby said valves maybe sev- WILLIAM J DAVIS [L S] erallyand suocesslvely opened and closed at stated periods, and means forrotating the WVitnesses:

shaft at intervals. J OHN HOWARD MGELROY,

In witness whereof I have hereunto set my I I MILD ED 'ELSNER.

Correction in Letters Patent No. 1,107,765.

It is hereby certified that in Letters Patent No. 1,107,765, grantedAugust 18, 1914,

upon the application of William J. Davis, of Chicago, Illinois, for animprovement in correction as follows: Page 4, after line 11], insert thesyllables and Words heating pipes extending from the inlet and outletpipes to the oats and pv'ovided with; and that the said Letters Patentshould be read with this correction therein that the same may conform tothe record of the oase in the Patent ()fiieer Signed and sealed this22nd day of September, A. D., 1914.

{SE L T v R. F. WHITEHEAD,

Actrhzg Commissioner qf Patents.

Pasteurizing Apparatus, an error appears in the printed specificationrequiring It is hereby certified that in Letters Patent No. 1,107,765,granted August 18,1914,

upon the application of William J. Davis, of Chicago, Illinois, for animprovement in Pasteurizing Apparatus, an error appears in the printedspecification requiring correction as follows: Page 4, after line 11],insert the syllables and words nesting pipes extending front the inletand outlet t0 the oats and pmrvz'ded with;

and that the said Letters Patent should be read with this correctiontherein that the same may conform to the record of the case in thePatent Otfice.

Signed and sealed this 22nd day of September, A. D., 1914.

SEAL R. F. WHITEHEAD,

Acting Commissioner of Patents.

